Frequency and contingency are two primary statistical factors that drive the acquisition and processing of language. This study explores the role of phrasal frequency and contingency (the co-occurrence probability/statistical association of the constituent words in multiword sequences) during online processing of multiword sequences. Meanwhile, it also examines language users’ sensitivity to the two types of statistical information. Using the eye-tracking paradigm, native and advanced nonnative speakers of Chinese were instructed to read 80 disyllabic two-word Chinese adverbial sequences embedded in sentence contexts. Eye movements of the participants were recorded using both early and late measures. Mixed-effects modeling revealed that both phrasal frequency and contingency influenced the processing of the adverbial sequences; however, they were likely to function in different time windows. In addition, both native and nonnative speakers were sensitive to the phrasal frequency and contingency of the sequences, though their degrees of such sensitivity differed. Our findings suggest that adult language learners retain the statistical learning ability in second language acquisition and they may share a general statistical learning mechanism with native speakers when processing multiword sequences.

This study investigates how orthographic, semantic and contextual variables—including word length, concreteness, and contextual support—impact on the processing and learning of new words in a second language (L2) when first encountered during reading. Students learning English as a foreign language (EFL) were recruited to read sentences for comprehension, embedded with unfamiliar L2 words that occurred once. Immediately after this, they received a form recognition test, a meaning recall test, and a meaning recognition test. Eye-movement data showed significant effects of word length on both early and late processing of novel words, along with effects of concreteness only on late-processing eye-tracking measures. Informative contexts were read slower than neutral contexts, yet contextual support did not show any direct influence on the processing of novel words. Interestingly, initial learning of abstract words was better than concrete words in terms of form and meaning recognition. Attentional processing of novel L2 words, operationalized by total reading time, positively predicted L2 learners’ recognition of new orthographic forms. Taken together, these results suggest: 1) orthographic, semantic and contextual factors play distinct roles for initial processing and learning of novel words; 2) online processing of novel words contributes to L2 learners’ initial knowledge of unfamiliar lexical items acquired from reading.